glGenFramebuffers11

glGenFramebuffers11 is a function within the OpenGL graphics API. It is used to generate one or more texture names, which can then be used to create framebuffers. Framebuffers are objects that allow for off-screen rendering, meaning rendering can occur without directly writing to the default framebuffer displayed on the screen. This is essential for techniques like render-to-texture, shadow mapping, and post-processing effects.

When glGenFramebuffers11 is called, the OpenGL driver allocates a unique identifier for each requested framebuffer. These identifiers are then returned to the application. The application can then bind these generated framebuffer names using the glBindFramebuffer function to make them the active framebuffer for subsequent drawing operations. Textures can be attached to these framebuffers as color, depth, or stencil attachments, allowing the rendered output to be captured in a texture for later use.

The '11' in glGenFramebuffers11 is likely an indicator of a specific version or extension of OpenGL. In modern OpenGL, the function is simply referred to as glGenFramebuffers. The core functionality remains the same: generating framebuffer object names. It's important to note that the generated names are not immediately associated with any actual framebuffer data until a framebuffer is created and bound to that name. Memory management for these objects is handled by the OpenGL context.